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Rubber Lining Material / Natural Soft Rubber (NSR) / Resistance
Chemical Resistance of Rubber Lining

Inorganic Acids

Chemical 

 

Formula

Concentration

%

Natural Soft Rubber

R-6

RT

90°C

Sulfuric Acid

H2SO4

10

O
X

Sulfuric Acid

H2SO4

30

 O   X 

Sulfuric Acid 

H2SO4

50

O X

Sulfuric Acid 

H2SO4

70

 X   X 

Hydrochloric Acid

HCl

10

 O  X

Hydrochloric Acid

HCl

35

O  X 

Nitric Acid

HNO3

1

X  X 

Sulfurous Acid

H2SO3

0.5

X  X 

Phosphoric Acid

H3PO4

-

O O

Hydrofluoric Acid

HF

1

X X

Hydrofluoric Acid

HF

48

X X

Carbonic Acid

H2CO3

-

O  ∆ 

Chlorine Water

Cl2

satu

X  X 

Chlorine Gas

Cl2

wet

X  X 

Hydrobromic Acid

HBr

40

O  X 

Hydrogen Sulfid Water

H2S

-

 O 

Chromic Acid

H2CrO4

1

 X   X 


    O: Satisfactory       : Marginal       X: Unsatisfactory


Inorganic Alkalis

Chemical 

Formula

Concentration

%

Natural Soft Rubber

R-6

RT

90°C

Caustic Soda

NaOH

48

 O  O 

Caustic Potash

KOH

25

O O 

Aqua Ammonia

NH4OH

28

 X  


    O: Satisfactory       : Marginal       X: Unsatisfactory


Inorganic Salts Solutions

 Chemical 

Formula

Concentration

%

Natural Soft Rubber

R-6

RT

90°C

Sodium Hypochlorite

NaClO

-

 X 
X 

Calcium Hypochlorite

Ca(ClO)2

-

 ∆ 

X 

Sodium Chlorate

NaClO3

-

O  

Potassium Chlorate

KClO3

-

 O   

Sodium Chloride

NaCl

-

 O   

Calcium Chloride

CaCl2

-

 O   

Zinc Chloride

ZnCl2

-

 O   

Ammonium Chloride

NH4Cl

-

 O   

Sodium Sulfate

Na2SO4

-

 O   

Sodium Bicarbonate

NaHCO3

-

 O   

Potassium Bichromate

K2Cr2O7

-

 O   

Sodium Sulfite

Na2SO3

-

 O   

Potassium Sulfite

K2SO3

-

O
 

Sodium Sulfide

Na2S

-

 O   

Potassium Sulfide

K2S

-

 O   

Sodium Thiosulfate

Na2S2O3

-

 O   

Sodium Phosphate

Na3PO4

-

 O   

Potassium Chloride

KCl

-

 O   

Ammonium Carbonate

(NH4)2CO3

-

 O   

Ferric Chloride

FeCl3

-

 O   

Ammonium Sulfate

(NH4)2SO4

-

 O   

Stannous Chloride

SnCl2

-

 O   

Chromium Chloride

CrCl2

-

 O   

Nickel Sulfate

NiSO4

-

 O   

Silver Nitrate

AgNO3

-

 O   

Aluminum Sulfate

Al2(SO4)3

-

 O  O 

Sodium Silicate

Na2O . SiO2

-

 O  O 

Sodium Aluminate

NaAlO2

-

 O  O 

Magnesium Hydroxide

Mg(OH)2

-

 O  O 

PAC

[Al2(OH)nCl6-n]m

-

 O  O 


    O: Satisfactory       : Marginal       X: Unsatisfactory


Organic Acids

 Chemical 

Formula

Concentration

%

Natural Soft Rubber

R-6

RT

90°C

Acetic Acid

CH3COOH

10

X  X 

Glacial Acetic Acid

CH3COOH

10

   

Formic Acid

HCOOH

90

O X 

Oxalic Acid

(COOH)2

20

 O   

Butyric Acid

CH3CH2CH2COOH

100

 X  X 

Tartaric Acid

(CH OH COOH)2

50

 O  X 

Lactic Acid

CH3CH(OH)COOH

25

   


    O: Satisfactory       : Marginal       X: Unsatisfactory 

Organic Compounds

 Chemical 

Formula

Concentration

%

Natural Soft Rubber

R-6

RT

90°C

Acetone

CH3COCH3

-

 X 

Methanol

CH3OH

-

O X

Ethanol

C2H5OH

-

O  X 

n-Propylalcohol

C3H7OH

-

O  X 

n-Butanol

C4H9OH

-

   

Formaldehyde

HCHO

-

O X

Glycerin

C3H5(OH)3

-

O

Ethylene Glycol

(CH2OH)2

-

O

Triethanolamine

N(CH2CH2OH)3

-

 O 

Glucose

C6H12O6

-

O

    O: Satisfactory       : Marginal       X: Unsatisfactory